http://www.teacherschoice.com.au/Maths_Library/Trigonometry/sine_ratio_1.htm-This is a cite where it gives you the definition along with several examples of what the sine ratio is and how you can use it with specific right triangles. It also has some interactive gadgets at the bottom of the page that you can use in order to find side lengths and angles using the sine ratio.
Sine Ratio:
http://www.teacherschoice.com.au/Maths_Library/Trigonometry/sine_ratio_1.htm- This is a cite where it gives you the definition along with several examples of what the sine ratio is and how you can use it with specific right triangles. It also has some interactive gadgets at the bottom of the page that you can use in order to find side lengths and angles using the sine ratio.
http://www.brightstorm.com/math/precalculus/basic-trigonometry/trigonometric-ratios-sine this site has a short video that explanes what and how sine works.
http://www.youtheducationservices.ca/secure/subjects/trigonometry/pdfs/9sinWksht.pdf this is a worksheet that has problems and answers for the sine ratio.
http://www.prometheanplanet.com/en-us/Resources/Item/27569/finding-angles-using-the-sine-ratio This website has a filp cart showing how the sine is used to slove right triangles.
http://www.youtube.com/watch?v=xPJ9X1RDWZw
This is a 15 minute video on how to use the sine property, it also distinguishes when to use cosine, tangent, and sine.